For coursesin Cryptography, Computer Security, and Network Security. Keep pacewith the fast-moving field of cryptography and network security Stallings’ Cryptographyand Network Security: Principles and Practice introduces studentsto the compelling and evolving field of cryptography and network security. Inan age of viruses and hackers, electronic eavesdropping, and electronic fraudon a global scale, security is paramount. The purpose of this book is to providea practical survey of both the principles and practice of cryptography andnetwork security. The first part of the book explores the basic issues to beaddressed by a network security capability and provides a tutorial and surveyof cryptography and network security technology. The latter part of the bookdeals with the practice of network security, covering practical applicationsthat have been implemented and are in use to provide network security.